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The AWS SDK for Java with support for OSGi. The AWS SDK for Java provides Java APIs for building software on AWS' cost-effective, scalable, and reliable infrastructure products. The AWS Java SDK allows developers to code against APIs for all of Amazon's infrastructure web services (Amazon S3, Amazon EC2, Amazon SQS, Amazon Relational Database Service, Amazon AutoScaling, etc).

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/*
 * Copyright 2011-2016 Amazon.com, Inc. or its affiliates. All Rights Reserved.
 * 
 * Licensed under the Apache License, Version 2.0 (the "License"). You may not
 * use this file except in compliance with the License. A copy of the License is
 * located at
 * 
 * http://aws.amazon.com/apache2.0
 * 
 * or in the "license" file accompanying this file. This file is distributed on
 * an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either
 * express or implied. See the License for the specific language governing
 * permissions and limitations under the License.
 */
package com.amazonaws.services.sns.model.transform;

import java.util.Map;
import java.util.HashMap;
import java.util.ArrayList;
import java.util.Map.Entry;

import javax.xml.stream.events.XMLEvent;

import com.amazonaws.services.sns.model.*;
import com.amazonaws.transform.Unmarshaller;
import com.amazonaws.transform.MapEntry;
import com.amazonaws.transform.StaxUnmarshallerContext;
import com.amazonaws.transform.SimpleTypeStaxUnmarshallers.*;

/**
 * GetTopicAttributesResult StAX Unmarshaller
 */
public class GetTopicAttributesResultStaxUnmarshaller implements
        Unmarshaller {

    private static class AttributesMapEntryUnmarshaller implements
            Unmarshaller, StaxUnmarshallerContext> {

        @Override
        public Entry unmarshall(StaxUnmarshallerContext context)
                throws Exception {
            int originalDepth = context.getCurrentDepth();
            int targetDepth = originalDepth + 1;

            MapEntry entry = new MapEntry();

            while (true) {
                XMLEvent xmlEvent = context.nextEvent();
                if (xmlEvent.isEndDocument())
                    return entry;

                if (xmlEvent.isAttribute() || xmlEvent.isStartElement()) {
                    if (context.testExpression("key", targetDepth)) {
                        entry.setKey(StringStaxUnmarshaller.getInstance()
                                .unmarshall(context));
                        continue;
                    }
                    if (context.testExpression("value", targetDepth)) {
                        entry.setValue(StringStaxUnmarshaller.getInstance()
                                .unmarshall(context));
                        continue;
                    }
                } else if (xmlEvent.isEndElement()) {
                    if (context.getCurrentDepth() < originalDepth)
                        return entry;
                }
            }
        }

        private static AttributesMapEntryUnmarshaller instance;

        public static AttributesMapEntryUnmarshaller getInstance() {
            if (instance == null)
                instance = new AttributesMapEntryUnmarshaller();
            return instance;
        }

    }

    public GetTopicAttributesResult unmarshall(StaxUnmarshallerContext context)
            throws Exception {
        GetTopicAttributesResult getTopicAttributesResult = new GetTopicAttributesResult();
        int originalDepth = context.getCurrentDepth();
        int targetDepth = originalDepth + 1;

        if (context.isStartOfDocument())
            targetDepth += 2;

        while (true) {
            XMLEvent xmlEvent = context.nextEvent();
            if (xmlEvent.isEndDocument())
                return getTopicAttributesResult;

            if (xmlEvent.isAttribute() || xmlEvent.isStartElement()) {

                if (context.testExpression("Attributes/entry", targetDepth)) {
                    Entry entry = AttributesMapEntryUnmarshaller
                            .getInstance().unmarshall(context);
                    getTopicAttributesResult.addAttributesEntry(entry.getKey(),
                            entry.getValue());
                    continue;
                }

            } else if (xmlEvent.isEndElement()) {
                if (context.getCurrentDepth() < originalDepth) {
                    return getTopicAttributesResult;
                }
            }
        }
    }

    private static GetTopicAttributesResultStaxUnmarshaller instance;

    public static GetTopicAttributesResultStaxUnmarshaller getInstance() {
        if (instance == null)
            instance = new GetTopicAttributesResultStaxUnmarshaller();
        return instance;
    }
}